| Frankfort to Orbetello | 4,778.17 mi (7,689.72 km) |
| Frankfort to Oria | 5,126.93 mi (8,251.00 km) |
| Frankfort to Oristano | 4,759.17 mi (7,659.15 km) |
| Frankfort to Orta Nova | 5,012.13 mi (8,066.25 km) |
| Frankfort to Orte | 4,827.23 mi (7,768.67 km) |
| Frankfort to Ortona | 4,916.30 mi (7,912.03 km) |
| Frankfort to Orvieto | 4,805.66 mi (7,733.96 km) |
| Frankfort to Orzinuovi | 4,614.78 mi (7,426.77 km) |
| Frankfort to Osimo | 4,833.70 mi (7,779.08 km) |
| Frankfort to Ospitaletto | 4,614.94 mi (7,427.03 km) |
| Frankfort to Ostuni | 5,115.12 mi (8,231.99 km) |
| Frankfort to Ottaviano | 4,979.29 mi (8,013.39 km) |
| Frankfort to Ovada | 4,588.44 mi (7,384.37 km) |
| Frankfort to Ozieri | 4,752.06 mi (7,647.69 km) |
| Frankfort to Paceco | 5,009.76 mi (8,062.43 km) |
